Apply DEP_DIRDEPS_FILTER.${DEP_MACHINE} as needed.

Use DEP_DIRDEPS_FILTER.host to supress dependencies for host tools.

share/mk/local.dirdeps.mk

@@ -1,13 +1,3 @@
-.if !target(_DIRDEP_USE)
-# first time read
-.if ${MACHINE} == "host"
-DIRDEPS_FILTER+= \
-	Ninclude* \
-	Nlib/* \
-	Ngnu/lib/* \
-
-.endif
-.endif
 
 # this is how we can handle optional dependencies
 .if ${MK_SSP:Uno} != "no" && defined(PROG)
@@ -18,3 +8,15 @@ DIRDEPS += gnu/lib/libssp/libssp_nonshared
 .if ${DEP_RELDIR:U${RELDIR}} != "pkgs/pseudo/stage"
 DIRDEPS += pkgs/pseudo/stage
 .endif
+
+# we want to supress these dependencies for host tools
+DEP_DIRDEPS_FILTER.host = \
+	Ninclude* \
+	Nlib/* \
+	Ngnu/lib/* \
+
+
+.if !empty(DIRDEPS) && !empty(DEP_DIRDEPS_FILTER.${DEP_MACHINE})
+DIRDEPS := ${DIRDEPS:${DEP_DIRDEPS_FILTER.${DEP_MACHINE}:ts:}}
+.endif
+

share/mk/local.sys.mk

@@ -83,6 +83,10 @@ HOST_OBJTOP ?= ${OBJROOT}${HOST_TARGET}
 
 .if ${OBJTOP} == ${HOST_OBJTOP} || ${REQUESTED_MACHINE:U${MACHINE}} == "host"
 MACHINE= host
+.if ${TARGET_MACHINE:Uno} == ${HOST_TARGET}
+# not what we want
+TARGET_MACHINE= host
+.endif
 .endif
 .if ${MACHINE} == "host"
 OBJTOP := ${HOST_OBJTOP}